Events that occurred on 25 November.
 On Earth
- 1926 - American author Poul Anderson is born.
- 1936 - J.R.R. Tolkien delivers the lecture "Beowulf: The Monsters and the Critics" to the British Academy.
- 1951 - J.R.R. Tolkien writes a letter to Iona and Peter Opie.
- 1955 - Actor Bruce Hopkins is born.
- 1955 - The second episode of 1956 radio series of The Lord of the Rings on the BBC Third Programme.
- 1969 - J.R.R. Tolkien writes Letter 313.
- 1980 - The BBC Radio parody series Hordes of the Things first airs.
- 2011 - The Lord of the Rings: War in the North is released in the United Kingdom.
- 2021 - A windstorm labelled Storm Arwen by the Met Office hits the north-east UK with 120 km/h winds, causing fatalities, widespread damage and power outages to 130,000 households.
 In Arda